Brush construction



1934. E. E. ROBINSON BRUSH CONSTRUCTION Filed Nov. 10, 1933 INVENVTCR Edward/J 50/11/7504 ATTORN EY WITNESSES Z% .7/203 La Patented Feb. 20, 1934 UNITED STATES PATENT OFFICE Application November 10, 1933 Serial No. 697,508

1 Claim.

This invention relates to the construction of brushes, such as paint brushes and other closely analogous brushes.

The principal object of the invention is to provide an improved connection between the handle and the bristles of a brush, to the end that the bristles will be effectually retained in place and that the durability and serviceability of the brush will be increased.

The nature of the invention and its distinguishing features and advantages will appear when the following specification is read in connection with the accompanying drawing, in which Figure 1 is a section through a brush embodying the invention, the section being taken on the line 1-1 of Fig. 2;

Fig. 2 is a section taken on the line 2-2 of Fig. 1;

Fig. 3 is a fragmentary section showing a modified form of the invention;

Fig. 4 is a section taken on the line li of Fig. 3.

In accordance with the invention, use is made of a plug 10 consisting of a piece of rigid material, such as fiber, metal, or wood. The plug 10 is of uniform thickness throughout, and the opposite side faces thereof are parallel. The plug 10 is notched so as to provide relatively wide and narrow portions 11 and 12. The plug 10 is secured to the head 13 of the handle 14 of the brush. This is accomplished by forming a mortise or groove 15 in the head 13 extending entirely across the same from one side to the other. The wide portion 11 of the plug 10 is disposed in the groove 15, said portion 11 fitting in the groove and being secured to the walls of the groove by any suitable securing composition, such as glue or other suitable cement 16. The portion 11 of the plug is equal in width to the width of the head 13 at the grooved portion of the latter.

The root or butt ends 19 of the bristles 1'7 of the brush are assembled within a metal ferrule 18 after the said ends have been thoroughly saturated with a suitable setting composition, such as a liquid rubber compound. The narrow portion 12 of the plug, which projects from the head 13, is embedded or planted in the root or butt ends of the bristles 1'], so as to be compactly surrounded by said ends, and so as to be bonded with the bristles. In other words, the plug 10 is cemented to the butt of the bristles. Thus an effectual connection is made between the handle and the bristles.

It is to be understood that pressure is applied all around the ferrule 18 to compact the bristles against the plug 10. A power press is used to clinch the edge portion 20 of the ferrule against the head 13, the latter having a shoulder 21 engaged by said edge 20, and the other edge 22 of the ferrule is clinched against the bristles 1'7 at a point coincidental with the edge of the portion 12. The bristles are kept from working loose from continual use of the brush; consequently, the durability and serviceability of the brush will be materially increased by the simple and efficient means disclosed in Figs. 1 and 2.

As shown in Figs. 3 and 4, use is made of a plurality of dowels 23 in lieu of the plug 10. Each of these dowels is secured in a socket in the head 13, as at 24, and projects from the head so as to be embedded or planted in the butt of the bristles within the ferrule 18, thereby accomplishing the same results mentioned above.

What I claim is:

In a brush, a handle, bristles, a plug made of flat rigid material, said handle having a groove in its head, an edge portion of the plug fitting in said groove and being secured to the head, the remaining portion of the plug being of less width than said head and being compactly surrounded by the butt ends of the bristles, said butt ends being bonded together with said plug, and a ferrule secured to said head and embracing the butt ends of the bristles.

EDWARD E. ROBINSON. 

